Compressor



E. R. DE LUlZ.

COMPRESSOR. APPLICATION- nuso DEC. 22. I919.

Patented Jan. 4,1921.

' UNITED STATES PATENT OFFICE.-

IJDWARD R. .DE LUIZ, OF DETROIT, MICHIGAN, ASSIGNOR '10 KELVINATOR CORPORA- ,'1ION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE. I

comrnnsson.

Specification of Letters Patent.

Application filed December 22, 1919. Serial No. 346,586.

R. De LUIz,

which the followin is a full, clear, and exact description, re erence being had to the accompanylng drawings.

This invention relates to compressors for gaseous fluld particularly such as are used in refrigerating apparatus, and has especial ing shaft of the compressor projects through. the wall of the casin since it is at this point that leakage of resuch lea reference torefrigerating apparatus of the domestic type although not necessarily lim- While it is well known that ited thereto. the requirements of all .refrigerating machinery are severe, owing to the offensive and corrosive nature of the fluids employed, it

is a fact that a device for domestlc use has.

peculiarly severe requirements owing to the irregularityof' its use, the lack of skilled or constant attention, and the high pressure to which it is occasionally subjected. Such a device is often left unused for long periods of time, such as during the winter months, yet the demand is made that it shall start instantly and operate perfectly at the end of that time; also owing to temporary vacation of premises, discontinuance of electric current, or for accidental reasons, such apparatus is frequently left idle for extended periods in hot weather as a result of" which the refrigerant fluid, which under ordinary operating conditions exists largely in the liquefied state, becomes wholly gasified with the "roduction of internal pressure far beyon those which would normally occur; Notwithstanding these extreme drawbacks, no leakage must occur, either of air inward or of refrigerant outward, and no corrosion must result for otherwise the machine might not run when called on.

One of the most fruitful sources of troll 'ble. in I previous refrigerating systems has originated. atthe'point where the'main driv-- in which it revolves,

frigerant or lubricant fluid, inletof air, and corrosion of the parts has most frequently occurred. The objects of the present invention are the provision of a compressor of such construction asto overcome and avoid ge without suchnicety of fit as will imp'e e the operation of the compressor;

the provision of a compressor of such nature and construction as always to remain tight under all conditions of temperature Patented Jan.4, 1921.

and pressure; the provision of. a compressor I it will be understood that this drawing is intended to be merely illustrative and not limiting upon me. In this drawingjFigure 1 represents a longitudinal vertical sectional View through the crank casing of a preferred design of compressor embodying my improvements; Fig. 2 is a detail view illustrating a modified arrangement of the sealing parts.

The particular compressor shown is of the cylinder type and comprises a cylinder block 1 1' having therein the cylinders 2, 3, and integral therewith the hollow crank-case 4.

One end vof this crank-case is formed with a hollow boss 5 having a bearing 6 therein while the other end is formed with the aperture 7 to whichis bolted a closure plate 8, which carries a bearing-bushing 9. Journaled in these bearings is acrank-shaft 10 that is provided outside the crank-case with a receiving portion 11 adapted to have a with sin-outwardly facing shoulder 15, and

outside, of that shoulder with a reduced portion 16 provided witlr screw threads which are at least as large in diameter as the portion 11; and against the face of the shoulder 15, 1' secure-a bearing ring 18 by means of a nut 19. A gasket 19 of-some soft metal such as lead or copper is prefring 18.

tially-corrugated, flexible sheet metal, the opposite end of said sheath being hermeti- .eally attached to the face of the plate 8 in,

any suitable manner as by having its margin flared and clamped beneath the ring 23 which is bolted thereto. While. I do not limit myself in this regard, I have found the corrugated metal as manufactured by the ulton Company of Knoxville, Tennessee, to be very satisfactory for, this purpose, and for the anti-friction metal 21, I

ave-employed with great success the so- 1 called genelite metal or graphite-containing bronze alloy as described and claimed in the application of 'E. J. Copeland, filed January 31, 1918, Serial No. 214,605. In order to maintain constant contact between the collar 20 and ring 18, I place the former under spring pressure as by the use of a helical spring 25 having one of its ends seated in a recess 26 formed in the outer face of the ring 23 and having its opposite end rest-- ing against a split ring 27 mounted in a groove 28 of the collar 20. I have shown the ring 23 and other arts as surrounded by a hollow shield 30, w ich is the preferred construction, but which has no bearing upon the operation of'the device.

In the construction shown in Fig. 1, the

shoulder 15 is located at a suflicient distance from the end ofthe bushing 9 to accommo- Fig.'2 I have shown a modified arrangement wherein the shoulder 15-is located very-close to said bushing, and the-bearing ring 18 is formed with an internal cylindrical extension or sleeve '18" of a length sulfic ent to receive the sealing members, the lo- 'cation of the thread17 and nut 19 remaining as before. Leakage beneath the ring is prevented by a gasket 19. The collar 20 surrounds the sleeve portion 18? of the ring and is here illustrated as made entirel of 9 1 i-f1'iction metal such f r example secured directly to the anti-friction metal,

bitt metal. The sheath 22 is in this instance and .the same spring 25 and split ring 27 are em 'loyed as before. I V

wing to the fact that the bearingring faces'inwardly, gas' pressure inside the compressor has a tendency to force the collar 20 outwardl and thereby increase the tight ness of t e joint, while the location of the sp'rug 25 outside the sheath facilitates the assem ly, nspection and repair of the apticular materials herein mentioned and that the embodiments here shown constitute only a small number out of the many constructions in which my inventive idea may be utilized, wherefore I do not restrict myself in any way except as specifically recited, in the claims hereto annexed or rendered necessary by the prior state of the'art;

Having thus described my invention, what I claim is 1. In a compressor, in combination, a casing having an opening and a shaft projecting through said opening and having an outwardl facing shoulder, a bearing ring surrounding the shaft outside of said shoulder and clamped thereagainst, said bearing ring'havin'g an inwardly facing peripheral bearing portion, a collar bearing against such 'perlpheral portion, a flexible memberhermetically joined to said collar and casing, and a spring forcing said collar toward said. ring. a

2. In a \compressor, in combination, a casing having an opening and a shaft projecting through said open1ng,.said shaft having V bearing surface and casing, a flexible sheet- 7 metal member hermetically joined to said collar and casing, .and a spring forcing said. o collar toward said bearing surface. date the entire sealmg mechanlsm, but in a 3. In a compressor, in combination,-a cas ing having an opening and a shaft projecting through said opening and having an outwardly facing shoulder; a bearing ring surrouding the shaft outside of said shoulder and clamped thereagainst, said bearing ring having an inwardly facing peripheral portioni acollar bearing against such pe-.

having an inwardly facing peripheralportion, a collarbearing against such perlphveral portion, .a longitudinallyexpansible,

ciroumferentlally-corrugated, flexible sheet metal sheath, hermetically secured to said ing having an opening, a shaft rotatably mounted in said opening and having an annular outstandlng bearing surface spaced from and turned toward sa1d casing, a collar surrounding said shaft between said bearing surface and easing, a longitudinally expansible, circumferentially-corrugated, flexible sheet metal sheath hermetically joined to said collar and casing, and spring means lfiolding said collar against said bearing surace.

6. In a compressor, in combination, a casing having an opening, a shaft rotatably mounted in said opening and having an annular outstanding bearing surface spaced from and turned toward said casing, a collar surrounding said shaft between said bearing surface and casing, a longtiudinally expansible, circumferentially corrugated,

flexible sheet metal sheath hermetically joined to said collar and casing, and a hellcal spring surrounding said sheath and lolding said collar against said bearing surace.

71111 a compressor, in combination, a casing having an opening, a shaft rotatably mounted in said opening and having an annular outstanding bearing surface spaced from and turned toward said casing, a collar surrounding said shaft between said bearing surface and casing, a longitudinally .expansible, circumferentially corrugated,

flexible sheet metal sheath hermetically joined to said collar and easing, said collar having an external groove, a split ring in said groove, and a coil spring having one end embracing and seated against said ring and the other seated against said casing outside of said sheath.

, In testimony whereof I hereunto afiix my signature.

' EDWARD R. DE LUIZ. 

